GHK Cu Peptide Regenerative & Cosmetic Research Hi : ) CAIS is NIOD's Copper Amino Isolate Serum. It contains GHK peptides bound to copper which is known as copper peptides (GHK Cu) that are found in our plasma and are good Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with NIOD COPPER AMINO ISOLATE SERUM 3 1:1 (CAIS3) BEST ANTI AGING SERUM, BEST PEPTIDE SERUM These are the five copper peptide treatments currently on rotation: NIOD CAIS: watery, lightweight, and still the most effective option on our list. There is something so deeply hydrating and reparative about Fountain Health NYC GHK Cu Peptide